Camlough Lake (from the Irish for Crooked Lake) was formed as a Glacial ribbon lake, and takes its name from its irregular shape – although its modern form does not appear particularly crooked its shape was much less regular in the past before its level was raised by the embankment built in the late 19th century. The glacial left-over sits in a valley carved between Slieve Gullion and Camlough Mountain and is today the largest lake in the Ring of Gullion.

The rotation of the Earth causes the apparent position of the stars to rotate around the direction of the Earth's rotational axis - approximately the position of Polaris - a relative motion that can be captured on camera.